Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering

M. Aghasyan, M. G. Alexeev, G. D. Alexeev, A. Amoroso, V. Andrieux, N. V. Anfimov, V. Anosov, A. Antoshkin, K. Augsten, W. AugustyniaK, A. Austregesilo, C. D.R. Azevedo, B. BadełeK, F. Balestra, M. Ball, J. Barth, R. BecK, Y. Bedfer, J. Bernhard, K. BickerE. R. Bielert, R. Birsa, M. BodlaK, P. Bordalo, F. Bradamante, A. Bressan, M. Büchele, V. E. Burtsev, L. Capozza, W. C. Chang, C. Chatterjee, M. Chiosso, I. Choi, A. G. Chumakov, S. U. Chung, A. Cicuttin, M. L. Crespo, Q. Curiel, S. Dalla Torre, S. S. Dasgupta, S. Dasgupta, O. Yu Denisov, L. Dhara, S. V. Donskov, N. Doshita, Ch Dreisbach, W. Dünnweber, R. R. Dusaev, M. Dziewiecki, A. Efremov, P. D. Eversheim, M. Faessler, A. Ferrero, M. Finger, M. Finger, H. Fischer, C. Franco, N. Du Fresne Von Hohenesche, J. M. Friedrich, V. Frolov, E. Fuchey, F. Gautheron, O. P. GavrichtchouK, S. Gerassimov, J. Giarra, F. Giordano, I. Gnesi, M. GorzelliK, A. Grasso, A. Gridin, M. Grosse Perdekamp, B. Grube, T. Grussenmeyer, A. Guskov, D. Hahne, G. Hamar, D. Von Harrach, F. H. Heinsius, R. Heitz, F. Herrmann, N. Horikawa, N. D'Hose, C. Y. Hsieh, S. Huber, S. Ishimoto, A. Ivanov, T. Iwata, V. Jary, R. Joosten, P. Jörg, E. Kabuß, A. Kerbizi, B. Ketzer, G. V. Khaustov, Yu A. Khokhlov, Yu Kisselev, F. Klein, J. H. Koivuniemi, V. N. Kolosov, K. Kondo, K. Königsmann, I. Konorov, V. F. Konstantinov, A. M. Kotzinian, O. M. Kouznetsov, Z. Kral, M. Krämer, P. Kremser, F. Krinner, Z. V. Kroumchtein, Y. Kulinich, F. Kunne, K. KureK, R. P. Kurjata, I. I. Kuznetsov, A. Kveton, A. A. Lednev, E. A. Levchenko, M. Levillain, S. Levorato, Y. S. Lian, J. Lichtenstadt, R. Longo, V. E. Lyubovitskij, A. Maggiora, A. Magnon, N. Makins, N. Makke, G. K. Mallot, S. A. Mamon, B. Marianski, A. Martin, J. Marzec, J. MatoušeK, H. Matsuda, T. Matsuda, G. V. Meshcheryakov, M. Meyer, W. Meyer, Yu V. Mikhailov, M. Mikhasenko, E. Mitrofanov, N. Mitrofanov, Y. Miyachi, A. Moretti, A. Nagaytsev, F. Nerling, D. Neyret, J. Nový, W. D. NowaK, G. Nukazuka, A. S. Nunes, A. G. Olshevsky, I. Orlov, M. OstricK, D. Panzieri, B. Parsamyan, S. Paul, J. C. Peng, F. Pereira, M. PešeK, M. Pešková, D. V. Peshekhonov, N. Pierre, S. Platchkov, J. Pochodzalla, V. A. Polyakov, J. Pretz, M. Quaresma, C. Quintans, S. Ramos, C. Regali, G. Reicherz, C. Riedl, N. S. Rogacheva, D. I. Ryabchikov, A. Rybnikov, A. Rychter, R. Salac, V. D. Samoylenko, A. Sandacz, C. Santos, S. Sarkar, I. A. Savin, T. Sawada, G. Sbrizzai, P. Schiavon, K. Schmidt, H. Schmieden, K. Schönning, E. Seder, A. Selyunin, L. Silva, L. Sinha, S. Sirtl, M. Slunecka, J. SmoliK, A. Srnka, D. Steffen, M. Stolarski, O. Subrt, M. Sulc, H. Suzuki, A. Szabelski, T. Szameitat, P. Sznajder, M. Tasevsky, S. Tessaro, F. Tessarotto, A. Thiel, J. Tomsa, F. Tosello, V. Tskhay, S. Uhl, B. I. Vasilishin, A. Vauth, J. Veloso, A. Vidon, M. Virius, S. Wallner, T. WeisrocK, M. Wilfert, J. Ter WolbeeK, K. Zaremba, P. Zavada, M. Zavertyaev, E. Zemlyanichkina, M. Ziembicki

Research output: Contribution to journalArticle

Abstract

A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality Q2>1 (GeV/c)2, invariant mass of the hadronic system W>5 GeV/c2, Bjorken scaling variable in the range 0.003<x<0.4, fraction of the virtual photon energy carried by the hadron in the range 0.2<z<0.8, and square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/c)2<PhT2<3 (GeV/c)2. The multiplicities are presented as a function of PhT2 in three-dimensional bins of x, Q2, z and compared to previous semi-inclusive measurements. We explore the small-PhT2 region, i.e. PhT2<1 (GeV/c)2, where hadron transverse momenta are expected to arise from nonperturbative effects, and also the domain of larger PhT2, where contributions from higher-order perturbative QCD are expected to dominate. The multiplicities are fitted using a single-exponential function at small PhT2 to study the dependence of the average transverse momentum PhT2 on x, Q2 and z. The power-law behavior of the multiplicities at large PhT2 is investigated using various functional forms. The fits describe the data reasonably well over the full measured range.

Original languageEnglish (US)
Article number032005
JournalPhysical Review D
Volume97
Issue number3
DOIs
StatePublished - Feb 1 2018

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Aghasyan, M., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anfimov, N. V., Anosov, V., Antoshkin, A., Augsten, K., AugustyniaK, W., Austregesilo, A., Azevedo, C. D. R., BadełeK, B., Balestra, F., Ball, M., Barth, J., BecK, R., Bedfer, Y., Bernhard, J., ... Ziembicki, M. (2018). Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering. Physical Review D, 97(3), [032005]. https://doi.org/10.1103/PhysRevD.97.032006